ML19308D183

LER 78-005/03L-0:on 780109,one Sump Pump Failed to Start During Cable Tunnel Sump Pump Operability Test SP-322 Performance.Caused by Failure of Start Control Bulb Switch Due to Inadequate Current Capacity

ML19308D183
Person / Time
Site:	Crystal River
Issue date:	02/02/1978
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19308D179	List: ML19308D178 ML19308D183
References
LER-78-005-03L, LER-78-5-3L, NUDOCS 8002270651
Download: ML19308D183 (2)

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avsNr ossCmPTICN AND PACS ASLE CoNSEQbENCES notified Unit 3 that during the performange g i n mode 1 operation, Units 1 &

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g ,, , , Breaker vr.rification SP-321 was performed satisfactorily. Maintenance 1

,,,,,, restored the sump pump operable within seven hours. Second occurrence. ~ g

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CAUSE DESCMif f1 cps AND CORRICflVE ACTIONS

, , , c , g The cause of this event was to failure of the starr control bulb switch g , of the sump pump installed on 4 January 1978. The current capacity of the, t

, start switch supplied with packaged pump was inadequate. The switch was ,

l 7 , renewed with one of a higher current capacity and operability of the pump ,

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. . . , , SUPPLEMENTARI INFORMATION N

1. Repor No.: 50-302/78-005/03L-0

2. Facility: CrystalRiverdnit #3

3. Raport Date: 2 February 1978

4. Occurrence Date: 9 January 1978

5. Identification of occurrence:

Failure of one cable tunnel pump sump to start creating a condition contrary to Technical Specification 3.8.1.1.a.

6. Conditions Prior to Occurrence:

Mode 1 operation.

7. Description of Occurrence:

i At 0001, the Units 1 & 2 Shift Supervisor notified Unit 3 that when performing the .

Cable Tunnel Sump Pros Operability Surveillance Procedurs SP-322, one of the two sump pumps failed c: start. The one hour Action Statement of Technical Specification 3.8.1.1. was entered md both emergency diesel generators were verified operable and the Breaker Verificacica, SP-321, was performed. Units 1 & 2 maintenance restored operability of the sump pump at 0640 and SP-322 was complaced satisfactorily.

Designation of Apparent Cause:

The current capacity of the start control bulb switch for the pump installed en 4 January 1978 was inadequate, the switch failed rendering the pump inoperable.

9. Analysis of Occurrence:

There was no safety hazard to the plant or general public as both "3A" and "33" emergency diesel generators were available and verified operable.

10. Corrective Action: -

No corrective serion necessary as installation of a start control bulb switch of adequate current capacity restored operability of the pump.

l.. Failure Data:

This is the second occurrence of this event as reported by LER 78-002/03L-0.

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